Pinpoint Test AE: DTC B103D:11, 15

Adaptive Headlighting

Pinpoint Tests

Pinpoint Test AE: DTC B103D:11, 15

Normal Operation
- B103D:11 (Right Headlamp Control: Circuit Short To Ground) - sets when the Headlamp Control Module (HCM) detects a short to ground from any of the RH headlamp swivel circuits.
- B103D:15 (Right Headlamp Control: Circuit Short To Battery or Open) - sets when the HCM detects an open or short to voltage from any of the RH headlamp swivel circuits.

There are 4 circuits the HCM uses to monitor and actuate the stepper motors within the RH headlamp assembly. If the HCM detects a concern with any of these circuits, the HCM returns the LH headlamp to the center position and disables the adaptive headlamp functionality.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- RH headlamp assembly
- HCM



PINPOINT TEST AE: DTC B103D:11, 15

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AE1 CHECK THE SWIVEL MOTOR AND SENSOR CIRCUITS FOR A SHORT TO GROUND


- Ignition OFF.
- Disconnect: HCM C1600.
- Measure the resistance between the HCM, harness side and ground as follows:









- Are the resistances greater than 10,000 ohms?

Yes
GO to AE3.

No
GO to AE2.

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AE2 ISOLATE THE SWIVEL MOTOR AND SENSOR CIRCUITS FOR A SHORT TO GROUND


- Disconnect: RH Headlamp C1041.
- Measure the resistance between the HCM, harness side and ground as follows:









- Are the resistances greater than 10,000 ohms?

Yes
INSTALL a new RH headlamp assembly. REFER to Headlamp Assembly Service and Repair. CLEAR the DTCs. REPEAT the self-test.

No
REPAIR the circuit in question for a short to ground. CLEAR the DTCs. REPEAT the self-test.

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AE3 CHECK THE SWIVEL MOTOR AND SENSOR CIRCUITS FOR A SHORT TO EACH OTHER


- Disconnect: RH Headlamp C1041.
- Measure the resistance between the HCM pins, harness side and ground as follows:









- Are the resistances greater than 10,000 ohms?

Yes
GO to AE4.

No
REPAIR the circuits in question. CLEAR the DTCs. REPEAT the self-test.

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AE4 CHECK THE SWIVEL MOTOR AND SENSOR CIRCUITS FOR AN OPEN


- Measure the resistance between the HCM, harness side and the RH headlamp, harness side as follows:









- Are the resistances less than 5 ohms?

Yes
INSTALL a new RH headlamp assembly. REFER to Headlamp Assembly Service and Repair. CLEAR the DTCs. REPEAT the self-test.

If the DTC returns, GO to AE5.

No
REPAIR the circuit in question for an open. CLEAR the DTCs. REPEAT the self-test.

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AE5 CHECK FOR CORRECT HCM OPERATION


- Disconnect the HCM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the HCM connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new HCM. REFER to Headlamp Control Module (HCM) Headlamp Control Module (HCM). TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

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